static struct buffer_head *
affs_find_entry(struct inode *dir, struct dentry *dentry)
{
struct super_block *sb = dir->i_sb;
struct buffer_head *bh;
toupper_t toupper = affs_get_toupper(sb);
u32 key;
pr_debug("AFFS: find_entry(\"%.*s\")\n", (int)dentry->d_name.len, dentry->d_name.name);
bh = affs_bread(sb, dir->i_ino);
if (!bh)
return ERR_PTR(-EIO);
key = be32_to_cpu(AFFS_HEAD(bh)->table[affs_hash_name(sb, dentry->d_name.name, dentry->d_name.len)]);
for (;;) {
affs_brelse(bh);
if (key == 0)
return NULL;
bh = affs_bread(sb, key);
if (!bh)
return ERR_PTR(-EIO);
if (affs_match(dentry, AFFS_TAIL(sb, bh)->name, toupper))
return bh;
key = be32_to_cpu(AFFS_TAIL(sb, bh)->hash_chain);
}
}
int
affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh)
{
struct super_block *sb;
struct buffer_head *bh;
u32 rem_ino, hash_ino;
__be32 ino;
int offset, retval;
sb = dir->i_sb;
rem_ino = rem_bh->b_blocknr;
offset = affs_hash_name(sb, AFFS_TAIL(sb, rem_bh)->name+1, AFFS_TAIL(sb, rem_bh)->name[0]);
pr_debug("AFFS: remove_hash(dir=%d, ino=%d, hashval=%d)\n", (u32)dir->i_ino, rem_ino, offset);
bh = affs_bread(sb, dir->i_ino);
if (!bh)
return -EIO;
retval = -ENOENT;
hash_ino = be32_to_cpu(AFFS_HEAD(bh)->table[offset]);
while (hash_ino) {
if (hash_ino == rem_ino) {
ino = AFFS_TAIL(sb, rem_bh)->hash_chain;
if (dir->i_ino == bh->b_blocknr)
AFFS_HEAD(bh)->table[offset] = ino;
else
AFFS_TAIL(sb, bh)->hash_chain = ino;
affs_adjust_checksum(bh, be32_to_cpu(ino) - hash_ino);
mark_buffer_dirty_inode(bh, dir);
AFFS_TAIL(sb, rem_bh)->parent = 0;
retval = 0;
break;
}
affs_brelse(bh);
bh = affs_bread(sb, hash_ino);
if (!bh)
return -EIO;
hash_ino = be32_to_cpu(AFFS_TAIL(sb, bh)->hash_chain);
}
affs_brelse(bh);
dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
dir->i_version++;
mark_inode_dirty(dir);
return retval;
}
static struct buffer_head *
affs_find_entry(struct inode *dir, struct dentry *dentry, unsigned long *ino)
{
struct buffer_head *bh;
int intl = AFFS_I2FSTYPE(dir);
s32 key;
const char *name = dentry->d_name.name;
int namelen = dentry->d_name.len;
pr_debug("AFFS: find_entry(\"%.*s\")\n",namelen,name);
bh = affs_bread(dir->i_dev,dir->i_ino,AFFS_I2BSIZE(dir));
if (!bh)
return NULL;
if (namelen == 1 && name[0] == '.') {
*ino = dir->i_ino;
return bh;
}
if (namelen == 2 && name[0] == '.' && name[1] == '.') {
*ino = affs_parent_ino(dir);
return bh;
}
key = AFFS_GET_HASHENTRY(bh->b_data,affs_hash_name(name,namelen,intl,AFFS_I2HSIZE(dir)));
for (;;) {
unsigned char *cname;
int cnamelen;
affs_brelse(bh);
bh = NULL;
if (key == 0)
break;
bh = affs_bread(dir->i_dev,key,AFFS_I2BSIZE(dir));
if (!bh)
break;
cnamelen = affs_get_file_name(AFFS_I2BSIZE(dir),bh->b_data,&cname);
if (affs_match(name,namelen,cname,cnamelen,intl))
break;
key = be32_to_cpu(FILE_END(bh->b_data,dir)->hash_chain);
}
*ino = key;
return bh;
}
int
affs_insert_hash(struct inode *dir, struct buffer_head *bh)
{
struct super_block *sb = dir->i_sb;
struct buffer_head *dir_bh;
u32 ino, hash_ino;
int offset;
ino = bh->b_blocknr;
offset = affs_hash_name(sb, AFFS_TAIL(sb, bh)->name + 1, AFFS_TAIL(sb, bh)->name[0]);
pr_debug("AFFS: insert_hash(dir=%u, ino=%d)\n", (u32)dir->i_ino, ino);
dir_bh = affs_bread(sb, dir->i_ino);
if (!dir_bh)
return -EIO;
hash_ino = be32_to_cpu(AFFS_HEAD(dir_bh)->table[offset]);
while (hash_ino) {
affs_brelse(dir_bh);
dir_bh = affs_bread(sb, hash_ino);
if (!dir_bh)
return -EIO;
hash_ino = be32_to_cpu(AFFS_TAIL(sb, dir_bh)->hash_chain);
}
AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
AFFS_TAIL(sb, bh)->hash_chain = 0;
affs_fix_checksum(sb, bh);
if (dir->i_ino == dir_bh->b_blocknr)
AFFS_HEAD(dir_bh)->table[offset] = cpu_to_be32(ino);
else
AFFS_TAIL(sb, dir_bh)->hash_chain = cpu_to_be32(ino);
affs_adjust_checksum(dir_bh, ino);
mark_buffer_dirty_inode(dir_bh, dir);
affs_brelse(dir_bh);
dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
dir->i_version++;
mark_inode_dirty(dir);
return 0;
}
